Improvement in steam-jet devices for steam-generators



DAVIDM. NICHOLS,

OF NEW YORK, N. Y.

Letters Patent No. 91,255, dated .Tune 15, 1869.

IMPROVEMENT IN STEAMJET DEVICESTOR STEAM-GENERATORS.

The Schedule referred to in these Letters Patent and making part of thesame.

To all 'whom fit may concern:

` for the purpose of exciting a draught of air or gases;

and I declare that the following is a full,lclear, and

exact description and specification of my said invention. e

The invention which constitutes the subject-matter of this patentrelates to the steam-jet used for the purpose of acceleratingthe currentof air in the ues of steam-boilers, and for other purposes.

The invention is divided intoparts or improvements, the first of whichconsists of the combination of the steam-jet with a separator, whichseparates the dry steam from the spray of water and sediment carriedoil' from the boiler with it, so that the jet is supplied with drysteam, and the'water-is returned to the boiler.

'I hisimprovement greatly improves the practical operation of thesteam-jet, particularly when the boiler is fed with' unclean water, asthe sediment, that passes-oit` with the spray of water mixed with thesteam, is separated from the steam; consequently the obstruction 'of thenozzles of the steam-jet by a coating of sediment is eifectuallyprevented.

rlhe second part of my invention consists of the combination of thesteam-jet and separator with a valve or valves, by means of which thepassage or pas sages for the escape of the current of gases may becontracted while the steam-jet is in operation, so as to concentrate theaction of the nozzles cf the jet upon the air or gases on which thesteam is to act.

My improvements are embodied in the steam-jet represented in theaccompanyingdrawings, in which- Figure 1 represents a side elevation ot'a portion of aboilenfunnel with my improvements applied thereto;

AFigure 2 represents a longitudinal section of the same; and

Figure 3 represents a vertical transverse section of the funnel and itsappurtenances.

'The steam-jet represented in the accompanying drawings consists of aseries of nozzles, a a, from which the steam is discharged in anupward'direction in the funnel B.

Each nozzle is formed, at the upper end, of a pipe, b, whichcommunicates, at its lower end, with a horizontal supply-pipe, d. y

In the present example there` are three of these V supply-pipes d d d,one for each row of nozzles, and

these three pipes are connected with'a header or distributing-box, E,which is supplied with steam by means of a pipe, F.

The separator G is placed between the nozzles a and the boiler, whencethe steam is taken.V It consists of' a box or chest, itted with threepipes, one, 71, to convey steam into it, a second, j, to conduct the drysteam to the steam-jet, and the third, k, to drain oli' the water.

This last issues from the lower part of the separator, and thesupply-pipe h is turned downward in the box, so as to give the currentof mixed spray and steam, that enters by it, a downward direction,

The drain-pipe k should communicate with the intcrior of thesteam-boiler some distance below the water-level, and by preference nearits bottom, so that the passage of water down it will not be obstructedby the ascent of steam.

The supply-pipes d d fl of the steam-'jet are arranged atdi'erentlevels, so that the horizontal area of the flue at any pipe isgreater than it would be if all the pipes were at the same level; andthese pipes are arranged in an enlarged portion, L, of the ilue orfunnel, which is made so much larger than the regular funnel B, that theclear effective area for the passage of gases (notwithstanding thepresence of the supply-pipes) is fully as great as the area of thefunnel.

rlhe funnel is tted with two valves, M M, which, when closed, contractthe area, so that the effect of the steam-jet is concentrated upon thegases or air in its immediate vicinity; and the e'ect of the jet isincreased by surrounding it with a casing or pipe, N,

through which the gases are compelled to pass when the valves areclosed.

When the jet is not inoperation, the valves may be opened by operatingtheir levers, so as to render the whole area of the flue available for anatural draught. Y

The operation of the separator is as follows:

lhe current of mixed steam and spray of water, entering by thesteam-pipe h into the large space of the separator, is permitted tospread out, and consequently its speed is reduced snfliciently to permitthe water and sediment to drop by gravity, and drain ont by thedrain-pipe k, while the dry steam passes off to the steam-jet.

The downward turn of the supply-pipe in the separator facilitatesseparation, as the watery particles,

when once directed downward, do not tend to rise` again with the steam.s

If the current entering the separator be not directed downward, careshould be taken to arrange the steamdelivery aperture j out of thedirect path. of the current entering the separator, so that the lattermay be diused by contact with the side of the separator opposite itsentrance.

The form and construction of the separator may be greatly varied, and ifpreferred it may be arranged in the steam-space of the boiler, so thatit will be kept hot to prevent condensation in it.

So also the form of; the steam-jet, and number and form of the nozzlesof which it is composed, may be varied, as circumstances renderexpedient.

I do not claim the steam-jet byitself, nor the separator by itself; nordo I claim severally the other members of my new combinations; but

What I claim as my invention, and desire to secure escape of the currentof gases, substantially as before set forth.

In testimony whereof, I have hereto set my hand,

1. The combination of the steam-jet with a. sepa# rator, for separatingthe steam from the water which is mixed with it, substantially as beforeset forth. Witnesses:

2. Also, the combination of the steam-jet and sep- MELVILLE BIGGS,arator with a valve, to oontraot the passage for the J. RATHBONE, Jr.

DAVID M. NICHOLS.

by Letters Patent, is 1 this 11th day of October, A. D. 1867

